Improvement in sectional steam-generators



2 lSheets-'Sheet 1.

l. GRIFFITH, G. W. WUNDRAM & T. H. MULLER.

Steam Geneator.

.Patented 1an. 4,1370.

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2 Sh'eets--SheefZ1 '.l. GRIFFITH, 5G. W. YWUNRAM & T. H. MULLER.

Steam Generator. No. 98,490. Patented Jan. 4,1870.

. UNITED STATES 'PATENT Gamen.

JOHN GRIFFITH, GEORGE W. WUNDRAM, AND T. n. MLLER, OF New YORK,

IMPROVEMENT IN SE'CTIONAL STAM-GENEPLATORS.

Specification forming part of Letters Patent No. 98,430. dated January4, 1870.

this to bea full, clear, and eXact description thereof, which willenable those skilled in the e art to make and use the same, referencebeing had to the accompanying drawings, forming part of thisspecification, in which drawings.-

vFigure 1 represents a longitudinal vertical section of this invention.Fig. 2 is a horizontal section of the saine. Fig. 3 is an end view ofthe same. Fig. 4 is a transverse vertical section of the same.

Similar letters indica-te corresponding parts.

This invention relates to a sectional boiler which is provided with aset of pipes situated on the sides of the fire-place, whereby the effective heating-surface of the boiler is materially increased,an d thecirculation of the water is improved. The pipes which form the main bodyoi the boiler are staggered and united by heads vwhich are notstaggered, but set iu uniform rows,one above the other,each head beingso constructed thatit forms a ti ght j oint with the adjoiningheadsabove, below, and on its sides. To the upper head, on each side of theboiler, is secured a tubular bracket, which is fastened down by the samebolt that passes through the heads,and which serves to carry off thesteam, either into a drum provided for the purpose of containing thesame, ordirectly to the engine or other place where the same is used.With the water pipes are combined two or more bridge-walls and one ormore intermediate partition-walls, in such a manner that the lire iscompelled to pass up and down between said pipes in azi gzag course, andthat all the parts of each pipe are as near as possible heated to auniform temperature. The bricks formiu g the bridge-walls and the innerportion of the side walls are provided with semi-cylindricalindentationsor cavities to receive the several pipes, between which said bricks aretted in such a manner that the construction of said walls is materiallyfacilitated, andV that'the walls can be built close enough to thesurface ofthe pipes to intercept the passage of the heated gases. rJlhetop of the wall inclosin g our boiler is composed of brick and of twotriangular shoes, one on each side, said shoes being pressed up againstthe intervening brick-work by means of screw-bolts, and placed looselyon the top ofthe side walls,so that the expansion and contraction of thetop will have no injurious effect on the side walls. In practice the topis made in sections, so that each section can be readily taken olf andreplaced.

In the drawings, the letter A designates the furnace or fire-place ofour steam boiler, said fire-place being built into brick-work in theusual manner. are situated a series ot' pipes, B, which connect vwitheach other by` means of heads (l. These heads are placed one above theother, so that they form an inclined column,-being held together byscrew-bolts a, which pass through said heads, as shown in Fig. l of thedrawings. Each-of the heads C is provided with a socket, b, to receivethe pipes B, which are built into the brick-work,formin g supports forthe bricks c, which are provided with segmental indentations or cavitiesto receive said pipes, as shown in Fig. 4, and the center lines of thesockets Z) are situated in a plane passing in a verticaldircctionthrough the centers ot' the heads C, so that the pipes B are situated ina regular row, one above the other. By forming the bricks so as to litover a portion of the pipes the operation of repairing the side walls ismaterially facilitated, since by simply drawing the pipes above andbelow a course of said bricksa little apart the bricks can be withdrawnor introduced fromA the outside.

The body of the boiler is composed of a series of pipes, B', which areconnectedgto each other by means of heads C', each of these heads beingmade in the shape of a cross, and provided with sockets b to receive thepipes. These sockets, unlike the sockets of the heads C of the sidepipes, B, are situated on the sides of the vertical planes passingthrough the centers of the heads, so that the pipes B', instead o1forming regularrows, are staggered, each pipe being situated oppositethe space between the two pipes above or below. (Bestseen in Fig. 4.)The upright shanks c of the heads C are not situated in the same planeswith the horizontal shanks d, so that room is obtained for bolts a a2,which serve to unite said heads both in a horizontal and in a verticaldirection, and the heads U of the side pipes, which are in line with theheads C' `of the body-pipes, are also provided with horizontal shankscorresponding 0n each side of this lire-place in position to thehorizontal Shanks of the body-heads C', so that said body-heads C can befirmly drawn up against the side heads by means of thehorizontal boltsa2. Each of the heads C and C is also provided with a hand-hole, e, sothat by removing the covers of these handholes easy acccss can be had tothe pipes for the purpose of cleaning. By this arrangement of the headsC C all the parts of the boiler can be readily and firmly connectedwithout interrupting the free circulation of the water throughout thewhole boiler.

From the upper side heads rise the curved pipes or brackets D, which areso constructed that they can be fastened down to the heads by means ofthe bolts a, which also serve to secure said heads together, and thesecurved pipes serve to carry oli' the steam, either into a drum, E, ordirectly to the engine or other place where such steam is to fbe used.

The open spaces between the heads C C are closed by suitable plates orplugs, which may be put in loosely or fastened in any desirable manner.v

Under the body of the boiler are built two or more bridge-walls, F G,which extend up between the pipes B to the row of pipes next below thetop row, as shown in Fig. 1, and between these bridge-walls is apartition-wall, H, built up between the pipes Band extending clear up tothe top of the brick-work inelosing the boiler. This partitionwall andthose parts of the bridgewalls which extend up between the pipes aremade of bricks f, which are provided each with three or four segmentalindentations to admit the pipes, (see Fig. 4,) and by this formation ot'the bricks the construction ot' these walls is materially facilitated,and said walls can be easily built up so as to hook the pipes as closeas may be desirable. By the combination of the partition-walls H withthe bridge-walls F G, extending par tially up between the pipes, thefire is coinpelled to pass through between said pipes in a zigzagcourse, and all the parts of said pipes are heated as near as possibleto a uniform temperature.

The top I of the brick wall in which our boiler is set is constructed oftwo shoes,g,made of cast-iron,or any other suitable material, withinclined sides which form the support for the intermediate brick-work orarch,- h,said shoes being pressed up against the arch by screwbolts z'.vIn practice the top will be made in sections, so that each section canbe readily taken oi or replaced. The shoes g are placed loosely on thetop of the side Walls, so that said top can freely expand orcontraetwithout injuring the side walls. If desired, however, the archof the topmay be supported by metal girders extending clear across thebrick-work in place of the shoes g.

We do not wish to claim in this present application anything shown anddescribed in Letters Patent granted to T. H. Mller, October 27, 1868.

What we claim as new, and desire to secure by Letters Patent, is

l. The arrangement of the pipes B along the sides of the dre-chamber, inthe manner shown, so that said pipes shall be partially embedded in andform a support for the bricks, and that the bricks may be readilyrenewed for the purpose ot repair, substantially as set forth.

2. The heads C', provided with Vertical and horizontal shanks, and withsockets so arranged that while the heads are set in uniform rows oneabove another the sockets, and conseqnently the tubes, are staggered,substantially as shown and described.

3. The bricks provided with indentationson two ormore sides,incombination with the pipes B and B', substantially as described.

4.- The shoes g, in combination with the arch `h of the top I,substantially as set forth.

JOHN GRIFFITH. G. W. WUNDRAM. T. H. MULLER. Witnesses:

W. HAUFF, E. F. KAsrENI-IUBER.

